3649309 has 4 divisors (see below), whose sum is σ = 3661504. Its totient is φ = 3637116.

The previous prime is 3649307. The next prime is 3649313. The reversal of 3649309 is 9039463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3649309 - 2¹ = 3649307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5637 + ... + 6250.

It is an arithmetic number, because the mean of its divisors is an integer number (915376).

Almost surely, 2^3649309 is an apocalyptic number.

It is an amenable number.

3649309 is a deficient number, since it is larger than the sum of its proper divisors (12195).

3649309 is a wasteful number, since it uses less digits than its factorization.

3649309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12194.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 3649309 is about 1910.3164659291. The cubic root of 3649309 is about 153.9584556515.

The spelling of 3649309 in words is "three million, six hundred forty-nine thousand, three hundred nine".